Pipe bending device



Patented May 13, 1941 N i i E STAT E S T'- Ql? F 1 6E PEPE BENDINGDEVICE Howard A. Mertz, Ponca City, Okla, assi'gnor to Continental OilCompany, Ponca City, Okla, a corporation of Delaware Application June 3,1940, SeriaLNo. 338,563-

7 Claims.

My invention relates to a pipe bending device and more particularly to aportable device for bending pipes along any desired curvature.

One object of my invention is to provide a device for bending pipes.

Anotherobject of my invention is to provide a portable device forforming pipe sections into curves of any desired radius.

Other and further objects of my invention will appear from the followingdescription.

In the accompanying drawing which forms part of the instantspecification and is to be read in conjunction therewith and in whichlike reference numerals are used to indicate like parts in the variousviews;

Figure 1 is an elevation of a device showing one embodiment of myinvention.

Figure 2 is a top plan view of a pipe bending device shown in Figure 1.

Figure 3 is an end view of the pipe bending device shown in Figure 1.

Referring now to the drawing, the device is mounted on a suitable baseI, which is provided with openings 2 so that it may be bolted to anydesired support. A frame comprising a pair of plates 3 and 4 arepivotally mounted in the base I by means of a shaft 5, the frame plates3 and 4 being held in position by collars 6 and l and pins 8 and 9, ascan readily be seen by reference to Figure 3. A cross member ID issecured to both plates 3 and 4. Two roller sheaves II and I2 are securedto shafts l3 and M respectively. The shafts are journalled in the frameplates 3 and 4. A collar is pinned to shaft I3 by means of pin It. Theother end of shaft l3 which projects through plate 4 carries a pinionll, keyed to the shaft I3 by means of key l8. A shaft I9 is mounted forrotation in the frame above the shaft M. The end of shaft I9, whichprojects through plate 3, carries a gear wheel 20, which meshes withpinions 2| and 22, secured to stub shafts 23 and 24, having squaredends. I The end of shaft H] which projects through frame plate 4, haskeyed thereto by means of key 25, a sprocket wheel 26. A sprocket chain21 passes around sprocket wheel I! and sprocket wheel 26. The gear wheelmeshes with a gear wheel 28, which is keyed to shaft M. The stub shafts23 and 24 are mounted between frame plate 3 and a bracket plate 29 whichis secured to the frame plate 3 by means of stud bolts 33. An operatingcrank 31 fitted with a socket 32, adapted to fit the squared ends of thestub shafts and provided with a handle 33 is adapted to rotate thepinion with the shaft to which it is engaged.

Suitable bearings :33 and 34 are mounted on the base i. A' shaft 35 isjournaled in the bearings and carries a grooved sheave 36-. The rollersheaves l land [2 are provided with serrations 31, enabling them tofrictionally engage-a pipe to be bent. Mounted on the base i is asuitable jack such as a screw jack 38', the movable portion of which39engages the cross member Ill of the frame. The'jack is adapted-to beoperated by meansof an operating arm inserted inopenings alas is wellknown to the art.

In operation, thejack headz39 is lowered and the pipe il to be bent-isinserted through the rollers 50 that rollers 36 and H are on one-sideand roller [2 is on the other side of the pipe. The jack 38 is thenoperated'to rotate the frame around its shaft 5 so that the pipe is bentto the desired curvature. Any desired length of the pipe may then bebent tothe predetermined curvature by operating the crank 3|. It isunderstood, of course, that any suitable operating means may beprovided. The operating means, for example, may be a powered meansdriven by an electric motor. In event a power driven means is used, itsrotation will be in the same direction. It is for this reason that Iprovide two pinions 2| and 22 so that the gear 20 may be driven ineither direction, depending on whether it is desired to feed the pipe tothe right or to the left with respect to roller sheave 31.

It will be seen that I have accomplished the objects of my invention. Ihave provided a portable pipe bending device in which pipes may be bentto any desired radius and, if desired, reverse or 8 curves may be made.

It will be understood that certain features and sub-combinations are ofutility and may be employed without reference to other features andsub-combinations. This is contemplated by and is within the scope of myclaims. It is further obvious that various changes may be made indetails within the scope of my claims without departing from the spiritof my invention. It is, therefore, to be understood that my invention isnot to be limited to the specific details shown and described.

Having thus described my invention, I claim:

1. A pipe bending device including in combinaxtion a base, a frame,means for pivotally mounting said frame on said base, a pair of rollersmounted in said frame, a roller mounted on said base, means for rotatingone of said rollers and means for pivoting said frame to a desiredposition.

2. A pipe bending device including in combine,

tion a base, a frame, means for pivotally mountting said frame on saidbase, means for rotating said frame around its pivot, a first rollercarried by said frame, a second roller carried by said base, a thirdroller carried by said frame intermediate said first and second rollers,and means for rotating one of said rollers.

3. A pipe bending device including in combination a base, a frame, meansfor pivotally mounting said frame on said base, means for rotating saidframe around its pivot, a first roller carried by said frame, a secondroller carried by said base, a third roller carried by said frameintermediate said first and second rollers, and means for rotating saidfirst and third rollers.

4. A pipe bending device including in combination a base, a frame, meansfor pivotally mounting said frame on said base, means for rotating saidframe around its pivot, a first roller carried by said frame, a secondroller carried by said base, a third roller carried by said frameintermediate said first and second rollers, and means for rotating saidfirst and third rollers, said first and third rollers being providedwith roughened surfaces adapted to frictionally engage the pipe to bebent.

5. A pipe bending device including in combination a base, a frame, meansfor pivotally mounting said frame on said base, a jack for pivoting saidframe around its pivot, a first roller rotatably mounted in said frame,a second roller rotatably mounted on said base, a third roller rotatablymounted on said frame intermediate said first and second'rollers, saidthird roller being keyed to a shaft, a gear wheel mounted on said shaft,7

and means for rotating said gear wheel.

6. A pipe bending device including in combination a base, a frame, meansfor pivotally mounting said frame on said base, a jack for pivoting saidframe around its pivot, a first roller rotatably mounted in said frame,a second roller rotatably mounted on said base, a third roller rotatablymounted on said frame intermediate said first and second rollers, saidthird roller being keyed to a shaft, a gear wheel mounted on said shaft,an idler shaft mounted for rotation in said frame, a gear wheel on saididler shaft, meshing with the gear wheel on said roller shaft, a pinionengaging said idler gear, and means for rotating said pinion.

7. A pipe bending device including in combination a base, a frame, meansfor pivotally mounting said frame on said base, a jack for pivoting saidframe around its pivot, a first roller rotatably mounted in said frame,a second roller r0- tatably mounted on said base, a third rollerrotatably mounted on said frame intermediate said first and secondrollers, said third roller being keyed to a shaft, a gear wheel mountedon said shaft, an idler shaft mounted for rotation in said frame, a gearwheel on said idler shaft, meshing with the gear wheel on said rollershaft, a pinion engaging said idler gear, a sprocket wheel mounted onsaid idler shaft, a shaft for said first roller, a sprocket wheelmounted on said first roller shaft, a sprocket chain interconnectingsaid sprocket wheels, and means for rotating said pinion.

HOWARD A. MERTZ.

